This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 162 |
| 2 | 5154 |
| 3 | 67266 |
| 4 | 507906 |
| 5 | 2653346 |
| 6 | 10666146 |
| 7 | 35310402 |
| 8 | 100746498 |
| 9 | 255708578 |
| 10 | 590675490 |
| 11 | 1262903490 |
| 12 | 2531446530 |
| 13 | 4804547490 |
| 14 | 8702041250 |
| 15 | 15135668034 |
| 16 | 25410452994 |
| 17 | 41350565538 |
| 18 | 65453329442 |
| 19 | 101075312322 |
| 20 | 152654680578 |
| 21 | 225974263458 |
| 22 | 328470027426 |
| 23 | 469589919554 |